Astronomical transients refer to short-lived events or phenomena that occur in the universe, such as supernovae, gamma-ray bursts, and black hole mergers. These events typically last for a brief amount of time, ranging from seconds to months, and can provide valuable insights into the processes and dynamics of celestial objects. Astronomers study transients using a variety of observational techniques, including telescopes and space-based instruments, in order to capture and analyze these fleeting events. Understanding astronomical transients is essential for unraveling some of the most mysterious and energetic phenomena in the cosmos.